Preliminary data exploration of all data sets extracted:
Of note, age range for all data sets was filtered to individuals between 12 - 18 years old.
Number of Observations per Data Set
| Data Set | Number of Observations |
|---|---|
| One post-injury test (not merged with SIMS) | 9,991 |
| One post-injury test (merged with SIMS) | 257 |
| Two post-injury tests (not merged with SIMS) | 5,295 |
| Two post-injury tests (merged with SIMS) | 341 |
| Three post-injury tests (not merged with SIMS) | 2,228 |
| Three post-injury tests (merged with SIMS) | 143 |
| Four post-injury tests (not merged with SIMS) | 780 |
| Four post-injury tests (merged with SIMS) | 40 |
PCSS Score Description
| Symptom Cluster | Number of Items | Total Possible Score |
|---|---|---|
| Headache-Migraine Cluster | 3 | 18 |
| Anxiety-Mood Cluster | 5 | 30 |
| Cognitive Cluster | 4 | 24 |
| Ocular-Motor Cluster | 1 | 6 |
| Vestibular Cluster | 4 | 24 |
| Sleep Cluster | 5 | 30 |
| Total Symptom Score | 22 | 132 |
Overall, average symptom severity decreases with consecutive testing.
Two post-injury tests
5,295 concussion injuries
| Symptom Cluster | Mean Test 1 | SD Test 1 | Mean Test 2 | SD Test 2 |
|---|---|---|---|---|
| Headache-Migraine Cluster | 3.02 | 3.4 | 0.94 | 1.89 |
| Anxiety-Mood Cluster | 1.91 | 3.68 | 0.56 | 1.88 |
| Cognitive Cluster | 2.98 | 4.23 | 0.95 | 2.37 |
| Ocular-Motor Cluster | 0.36 | 0.92 | 0.1 | 0.44 |
| Vestibular Cluster | 2.01 | 3.1 | 0.45 | 1.37 |
| Sleep Cluster | 3.02 | 4.16 | 0.94 | 2.23 |
| Total Symptom Score | 13.31 | 16.76 | 3.94 | 8.62 |
Three post-injury tests
2,228 concussion injuries
| Symptom Cluster | Mean Test 1 | SD Test 1 | Mean Test 2 | SD Test 2 | Mean Test 3 | SD Test 3 |
|---|---|---|---|---|---|---|
| Headache-Migraine Cluster | 3.55 | 3.6 | 1.34 | 2.23 | 0.57 | 1.45 |
| Anxiety-Mood Cluster | 2.32 | 3.99 | 0.76 | 2.17 | 0.39 | 1.62 |
| Cognitive Cluster | 3.68 | 4.67 | 1.39 | 2.86 | 0.63 | 1.98 |
| Ocular-Motor Cluster | 0.45 | 1 | 0.13 | 0.5 | 0.06 | 0.33 |
| Vestibular Cluster | 2.48 | 3.39 | 0.68 | 1.66 | 0.26 | 1.06 |
| Sleep Cluster | 3.62 | 4.47 | 1.37 | 2.69 | 0.59 | 1.79 |
| Total Symptom Score | 16.09 | 18.1 | 5.68 | 10.28 | 2.49 | 6.96 |
Four post-injury tests
780 concussion injuries
| Symptom Cluster | Mean Test 1 | SD Test 1 | Mean Test 2 | SD Test 2 | Mean Test 3 | SD Test 3 | Mean Test 4 | SD Test 4 |
|---|---|---|---|---|---|---|---|---|
| Headache-Migraine Cluster | 4.04 | 3.66 | 1.83 | 2.54 | 0.99 | 1.91 | 0.6 | 1.66 |
| Anxiety-Mood Cluster | 2.7 | 4.3 | 1.07 | 2.64 | 0.63 | 2.04 | 0.43 | 1.99 |
| Cognitive Cluster | 4.31 | 5.02 | 2.08 | 3.5 | 1.12 | 2.65 | 0.68 | 2.37 |
| Ocular-Motor Cluster | 0.56 | 1.15 | 0.18 | 0.58 | 0.09 | 0.41 | 0.07 | 0.41 |
| Vestibular Cluster | 3.06 | 3.72 | 1.03 | 2.11 | 0.48 | 1.52 | 0.29 | 1.36 |
| Sleep Cluster | 4.28 | 4.85 | 1.98 | 3.25 | 0.98 | 2.35 | 0.54 | 1.87 |
| Total Symptom Score | 18.95 | 19.51 | 8.17 | 12.36 | 4.28 | 9.27 | 2.62 | 8.6 |
Overall, the average duration of time from injury onset to RTL completion (RTP step 2) was shorter than the average duration of time from injury onset to post-injury test 1.
One post-injury test
257 concussion injuries
| Benchmark | Mean | SD |
|---|---|---|
| Onset to Test 1 | 5.21 days | 4.91 days |
| Onset to RTL completion | 3.84 days | 4.09 days |
| Onset to RTP completion | 20.99 days | 11.6 days |
Two post-injury tests
341 concussion injuries
| Benchmark | Mean | SD |
|---|---|---|
| Onset to Test 1 | 4.91 days | 4.68 days |
| Onset to Test 2 | 9.72 days | 5.89 days |
| Onset to RTL completion | 3.87 days | 4.16 days |
| Onset to RTP completion | 21.23 days | 10.12 days |
Three post-injury tests
143 concussion injuries
| Benchmark | Mean | SD |
|---|---|---|
| Onset to Test 1 | 5.18 days | 5.03 days |
| Onset to Test 2 | 9.78 days | 5.61 days |
| Onset to Test 3 | 14.59 days | 6.97 days |
| Onset to RTL completion | 3.86 days | 4.02 days |
| Onset to RTP completion | 25.02 days | 10.97 days |
Four post-injury tests
40 concussion injuries
| Benchmark | Mean | SD |
|---|---|---|
| Onset to Test 1 | 6.5 days | 6.3 days |
| Onset to Test 2 | 12.57 days | 6.52 days |
| Onset to Test 3 | 17.4 days | 7.52 days |
| Onset to Test 4 | 23.82 days | 9.55 days |
| Onset to RTL completion | 5.05 days | 5.25 days |
| Onset to RTP completion | 33.9 days | 11.82 days |